Design and experimental analysis of an exhaust air energy recovery wind turbine generator

Ahmad Fazlizan Abdullah, Wen Tong Chong, Sook Yee Yip, Wooi Ping Hew, Sin Chew Poh

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

A vertical axis wind turbine (VAWT) was positioned at the discharge outlet of a cooling tower electricity generator. To avoid a negative impact on the performance of the cooling tower and to optimize the turbine performance, the determination of the VAWT position in the discharge wind stream was conducted by experiment. The preferable VAWT position is where the higher wind velocity matches the positive torque area of the turbine rotation. With the proper matching among the VAWT configurations (blade number, airfoil type, operating tip-speed-ratio, etc.) and exhaust air profile, the turbine system was not only able to recover the wasted kinetic energy, it also reduced the fan motor power consumption by 4.5% and increased the cooling tower intake air flow-rate by 11%. The VAWT had a free running rotational speed of 479 rpm, power coefficient of 10.6%, and tip-speed-ratio of 1.88. The double multiple stream tube theory was used to explain the VAWT behavior in the non-uniform wind stream. For the actual size of a cooling tower with a 2.4 m outlet diameter and powered by a 7.5 kW fan motor, it was estimated that a system with two VAWTs (side-by-side) can generate 1 kW of power which is equivalent to 13% of energy recovery.

Original languageEnglish
Pages (from-to)6566-6584
Number of pages19
JournalEnergies
Volume8
Issue number7
DOIs
Publication statusPublished - 1 Jan 2015
Externally publishedYes

Fingerprint

Wind Turbine
Turbogenerators
Experimental Analysis
Wind turbines
Recovery
Cooling towers
Vertical
Generator
Cooling
Turbine
Air
Energy
Turbines
Fans
Air intakes
Airfoil
Blade
Electricity
Kinetic energy
Airfoils

Keywords

  • Building integrated wind turbine
  • Clean energy
  • Energy savings
  • Exhaust air system
  • Urban wind energy

ASJC Scopus subject areas

  • Computer Science(all)
  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Energy (miscellaneous)

Cite this

Design and experimental analysis of an exhaust air energy recovery wind turbine generator. / Abdullah, Ahmad Fazlizan; Chong, Wen Tong; Yip, Sook Yee; Hew, Wooi Ping; Poh, Sin Chew.

In: Energies, Vol. 8, No. 7, 01.01.2015, p. 6566-6584.

Research output: Contribution to journalArticle

Abdullah, Ahmad Fazlizan ; Chong, Wen Tong ; Yip, Sook Yee ; Hew, Wooi Ping ; Poh, Sin Chew. / Design and experimental analysis of an exhaust air energy recovery wind turbine generator. In: Energies. 2015 ; Vol. 8, No. 7. pp. 6566-6584.
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